1 after the breakage of the sample, the pendulum impact of rapid decline.
2 do the tensile test, specimens were always on both sides of the fault.
3 hammer return is not normal, fast and slow. Passive needle can not be good to stop at any position, and main needle does not coincide.
4 dial pointer less sensitivity, pendulum position is not normal, impact testing machine swing rod for no vertical mark.
5 loading, hydraulic system oil leakage is serious or pipe burst.
Typically, impact testing machine fault solution for:
The tooth is inferior, 1 jaw quality damage, not only affect the jaw misalignment, also to spin the sample during the test, the yield point is difficult to discern. Change the jaw.
2 jaw clamping didn't put it, should according to the requirements of the clamp jaw symmetry good specimen.
3 lifting guide wheel adjustment is not correct, the upper and lower jaw misalignment. Should be processing a check rod, upper and lower jaw taut, with two column for dial indicator measuring basis, until the regulator until qualified. Replace appropriate oil viscosity. Check the oil line system joints are tightened, if necessary, replace the gasket, must be promptly replaced. If the pipe burst, check the oil line system joints are tightened, if necessary, replace the gasket, must be promptly replaced. If the pipe burst, so, need to change the oil, the higher strength in addition, we should also observe the oil supply valve, relief valve piston top dead or whether anti loaded.